Blast-fuktrace



J;KENNEDY. BLAST FUQNACE. APPLICATION FILED MAB. I5, 19H}.

1,303,914. Patented May 20, L919.

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INVENTOR -1. KENNEDY.

BLA STFURNACYE. APPLICATION FILED MAR. 15, ms 1,803,914, Patented Ma'y'ZO, 1919.

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JULIAN KENNEDY, OF PITTSBURGH, PENNSYLVANIA.

BLAST-FURNACE.

Specification of Letters Patent.

Patented May 20, 1919.

Application filed March 15, 1918. Serial No. 222,566.

T 0 all whom "it may concern: 1

Be it known that I, JULIAN KENNEDY, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Blast-Furnaces, of which-the following is'a full, clear, and exactdescription, reference being had to the accompanying drawings, forming part of this specification, in which Figures 1 and 2 are elevati0ns, at 90 to each other, of portions of a blast furnace structure embodying my invention.

Fig. 3 is a plan view of the same, and

Fig. 4- is a sectional view of the same showing two of the up-takes and a portion of one of the down-comer branches.

My invention has relation to blast furnaces, and more particularly to a novel construction and arrangement of the up -takes at the top of the of COIIIIPPHOII with the down-comer.

An ob ect'of my invention is to provide a construction and arrangement of the uptakes such as to prevent the discharge of an undue'amount ofthe finer material in the burden or charge of the furnace. A further object of my invention is to provide a convenient and novel construction and arrangement of the up-takes and down-comer, such that the down-comer may be carried underneath the skip track.

Other objects of my invention will hereinafter appear.

In the accompanying meral 2 designates a portion of the blast fur nace structure, 3 the superstructure at the top of the furnace, 4 the skip track and 5 the dust catcher. These parts may be of any well known or suitable construction, as they form no "part of my present invention.

In accordance wlth my invention, I provide the top ofthe furnace with a plurality of up-takes 6 arranged in two pairs, at opposite sides of the furnace. 7 designates the down-comer, having a branch 8 with which One pair of the up-takes are connected, and another branch 9 with which the up-takes of the other pair are connected. The two up-takes of each pair are provided at their upper ends with restricted outlets 10 which are arranged to discharge into a common connection 11 of elbow-shape leading to one of the down-comer branches, as best shown in Fig. 4. It will be noted that both u takes of each pair are connected behind t e furnaces and their manner drawing the nu-- scribed.

corresponding branch of the down-comer, and that the general arrangement is such that the down-comer may readily extend across the furnaces underneath the skip track or bridge 4, with one of its branches extending upwardly at each side of said track or bridge. This, however, is not es-' iential to the broader features of my invenion.

1 also preferably, but not necessarily, inchne the up-takes 6 so that they are oblique to the vertical axis of the furnace. By reason ofthis inclination, the inner walls of the uptakes will act as baffles to catch and throw down a portion of the finer material forming the furnace burden of the charge, particularly in case of explosions. The discharge of such material is further limited by the restricted outlets 10 at the upper ends of the outlets. The combined effect of these two features of my invention is to throw back into the furnace a very considerable portion of fine charge material which would otherwise pass into the down-comer.

By placing both up-takes of each pair at the same side of the down-comer branch with which they connect, it will be readily seen that there will be no confusion of the draft currents in these connections, the discharge from both up-takes of each pair passing in the same direction into the downcomer.

The connections 11 are preferably of gradually made increasing cross sectional area to accommodate the added volume discharged from the inner uptake of each pair.

Each of these connections 11 may be provided with a suitable relief valve at 12.

I do not desire to limit myself to the particular construction and arrangement of the parts which I have herein shown and described, as it is obvious that the exact arrangement and method of connecting the up-takes and down-comer may be changed in various ways, without departing from the spirit and scope of my invention, as defined in the appended claims.

I claim:

1. A blast furnace having'a plurality of uptake pipes extending above the top of the furnace proper, a down-comer, and a connection connecting the upper ends of the uptakes with the down-comers, said uptakes having restricted discharge openings leading into said connection,

substantially as dey 2. A blast furnace having a plurality of uptake pipes extending above the top of the furnace proper, a down-corner, and a connection connecting the upper ends of the uptakes with the down-comers, said uptakes having restricted discharge openings lead ing into said connection, and said uptakes extending in an oblique direction, substantially as described.

3. A blast furnace having a plurality of uptakes extending above the top of the furnace proper, a down-comer, and a connection connecting the upper ends of the uptakes with the down-comer, said uptakes extending in an oblique direction, substantially as described.

4. A blast furnace having its up-takes arranged in sets connected at their upper ends to a common outlet connection, and a downcomer to which said connection leads, all the up-takes of each set being arranged at the same side of the down-comer; substantially as described.

5. A blast furnace having its up-takes arranged in sets connected at their upper ends to a common outlet connection, and a downcomer to which said connection leads, the up-takes having restricted outlets communicating with the said connection; substantially as described.

6. A blast furnace having a skip track or bridge, a down-comer extending underneath said track or bridge, a plurality of uptakes arranged in pairs at opposite sides of the furnace, and a common outlet connection for each pair of the up-takes, each connection leading to a branch of the down-comer, and there being one branch of the down-comer at each side of the skip track or bridge; substantially as describe 7. A blast furnace having a skip track or bridge, a down-comer extending underneath said track or bridge, a plurality of u-p-takes arranged in pairs at opposite sides of the furnace, and a common outlet connection for each pair of the up-takes, each connection leading to a branch of the down-comer at each side of the .skip track or bridge, the up-takes having restricted outlets into said connections; substantially asdescribed. 8. A blast furnace having a down-comer pipe provided with two diverging branches at its upper end and two pairs of uptakes extending upwardly from the top ofthe furnace proper, and a connection between the upper ends of each pair of uptakes with one branch of the down-comer, substantially as described. I 1

In-testimony whereof, I have-hereunto set my hand.

JULIAN KENNEDY. 

